05531 - Beautiful Cut and Polished 1.97 Inch Septarian Nodule from South Morocco Obaichthys Cephalopoda - Ammonitida - Pseudotissotiidae
Yard notes & kiln story
Description
Cephalopoda - Ammonitida - Pseudotissotiidae
Most of the spines have been restored
unknown place in the Occidental Sahara Desert
Sources: Globidens sp : Fossilworks (Paleobiology Database)
Environments: marine (24 collections)
05531 - Beautiful Cut and Polished 1.97 Inch Septarian Nodule from South Morocco Obaichthys Cephalopoda - Ammonitida - PseudotissotiidaeSeptarian concretions or septarian nodules, are concretions containing angular cavities or cracks, called "septaria". The word comes from the Latin word septum; "partition", and refers to the cracks separations in this kind of rock. Cracks are highly variable in shape and volume, as well as the degree of shrinkage they indicate. Although it has commonly been assumed that concretions grew incrementally from the inside outwards, the fact that radially